How often are DTW to IAD flights on time?

Flights from Detroit (DTW) to Washington (IAD) arrive on time 85% of the time across 13,593 flights of official data.

Which airline is most reliable on the DTW to IAD route?

United Airlines has the best on-time record on this route at 88% across 5,848 flights.

Route reliability

Flights from Detroit to Washington arrive on time 85% of the time across 13,593 flights. Here’s how each airline really performs.

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On-time rate

13,593 flights

Airline	On-time	Flights
United Airlines	88%	5,848
Delta Air Lines	83%	7,745

On-time = arrived within 15 minutes of schedule, per BTS TranStats. Compare the reverse leg IAD → DTW.

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Score real DTW–IAD flights on reliability, weather, and connection safety — not just price.